Patents by Inventor Ryouichi Sugita

Ryouichi Sugita has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Memory card
    Patent number: 6772955
    Abstract: A memory card includes a first nonvolatile memory, a second nonvolatile memory, and a separating portion. The first nonvolatile memory has a predetermined erase unit. The second nonvolatile memory has an erase unit that is larger than the erase unit of the first nonvolatile memory. The separating portion separates at least the portion of the program data that are downloaded onto the memory card that has the possibility of being rewritten, and stores the separated portion onto the first nonvolatile memory and stores the remaining portion onto the second nonvolatile memory.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: August 10, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tetsuro Yoshimoto, Takayuki Tanaka, Miki Mizushima, Ryouichi Sugita, Takafumi Kikuchi
  • Memory card
    Publication number: 20030160102
    Abstract: A memory card includes a first nonvolatile memory, a second nonvolatile memory, and a separating portion. The first nonvolatile memory has a predetermined erase unit. The second nonvolatile memory has an erase unit that is larger than the erase unit of the first nonvolatile memory. The separating portion separates at least the portion of the program data that are downloaded onto the memory card that has the possibility of being rewritten, and stores the separated portion onto the first nonvolatile memory and stores the remaining portion onto the second nonvolatile memory.
    Type: Application
    Filed: July 12, 2002
    Publication date: August 28, 2003
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tetsuro Yoshimoto, Takayuki Tanaka, Miki Mizushima, Ryouichi Sugita, Takafumi Kikuchi
  • Memory card
    Publication number: 20030163717
    Abstract: A memory card includes a nonvolatile memory chip and a controller chip. The controller chip includes a first encrypting portion and a second encrypting portion. The first encrypting portion decrypts data input to the memory card that have been encrypted using a first key that is different for each session, using the first key. The second encrypting portion encrypts the data that are decrypted by the first encrypting portion using a second key. The nonvolatile memory chip stores the data encrypted by the second encrypting portion.
    Type: Application
    Filed: July 12, 2002
    Publication date: August 28, 2003
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tetsuro Yoshimoto, Takayuki Tanaka, Miki Mizushima, Ryouichi Sugita